Patent US3345334A successfully refreshed from Google Patents.
US3345334A
Expired / Lapsed
US
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Polyureas, poly (diazolidiones), and process for converting polyureas to poly
Assignee: EIDP Inc
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Filing: 1967-03-06
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Granted: 1967-10-03
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Expires: 1987-03-06
Abstract
No abstract record available.
Inventors
- 👤 Rudolph J Angelo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:06
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0683; C08G73/0694; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3819; C08G18/3821; C08G73/0605; C08G73/0616; Y; Y10; Y10S; Y10S525/00; Y10S525/928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
POLY(1,3-DIAZOLI-2,4-DIONE) HAVING THE STRUCTURAL FORMULA
Claim 2
Dependent Claim
5 words
POLY(1,3-DIAZOLI-2,4-DIONE) HAVING THE STRUCTURAL FORMULA
References Cited (Backward Citations)
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Cited
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Cited
US3242128A
Cited
US3244675A
Cited
US3278493A
Cited
US3261811A
Cited
US3271366A
Cited
US3282898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |